Seal



FIG. 1 is a perspective view of a seal showing our new design;

FIG. 2 is a right side view thereof;

FIG. 3 is a top view thereof;

FIG. 4 is a cross-sectional taken along line 4—4 of FIG. 3;

FIG. 5 is a left side view thereof;

FIG. 6 is another embodiment of a seal including a poppet;

FIG. 7 is a right side view thereof;

FIG. 8 is a top view thereof;

FIG. 9 is a cross-sectional view taken along line 9—9 of FIG. 8; and,

FIG. 10 is a left side view thereof. 

The ornamental design for a seal, as shown and described. 